Call Features

Call out / Answer / Reject
Mute / Unmute (microphone)
Call Hold / Resume
Call Waiting
Intercom
Caller ID Display
Speed Dial
Anonymous Call (Hide Caller ID)
Call Forwarding (Always/Busy/No Answer)
Call Transfer (Attended/Unattended)
Call Parking/Pick-up (depending on server)
Redial
Do-Not-Disturb
Auto-Answering
Voice Message (on server)
3-way Conference
Hot Line

Generic

6 SIP Lines
HD Voice
HD Video (No support camera for C400)
Support receiving Video call
POE Enabled
7 inch (800x480) color-screen
Handset / Hands-free / Headset mode
Intelligent DSS Keys (Virtual buttons)
Desktop / Wall-mount installation
Optional External Power Supply

Phone Features

Android 4.2.2 OS
Supports high quality video call (C600)
Local Phonebook (1000 entries)
Remote Phonebook (XML/LDAP, 1000 entries)
Call logs (in/out/missed, 1000 entries)
Black/White List Call Filtering
Screen saver
Voice Message Waiting Indication (VMWI)
Programmable DSS/Soft keys
Network Time Synchronization
Support HDMI output audio and video
Support Bluetooth headset (Through USB Dongle BT20)
Support local recording, local call recording and server recording
Action URL / Active URI
uaCSTA

Video

Video CODEC: H.263/H.264
Image format: JPEG/PNG/BMP/GIF
Video format: MP4/3GP/FLV
Video call resolution: QCIF/CIF/VGA/4CIF/720P
Bandwidth selection: 64kbps~4Mbps
Frame rate selection: 10~30fps
Picture-in-Picture (PIP) Highlights
Video from remote site can be displayed in full screen

Audio

HD Voice Microphone/Speaker (Handset/Hands-free, 0 ~ 7KHz Frequency Response)
Wide band ADC/DAC 16KHz Sampling
Audio format: WAV/MP3/OGG  Narrowband CODEC: G.711a/u, G.723.1, G.729AB, AMR, iLBC
Wide band CODEC: G.722
Full-duplex Acoustic Echo Canceller (AEC)
Voice Activity Detection (VAD) / Comfort Noise Generation (CNG) / Background Noise Estimation (BNE) / Noise Reduction (NR)
Packet Loss Concealment (PLC)
Dynamic Adaptive Jitter Buffer
DTMF: In-band, Out-of-Band – DTMF-Relay(RFC2833) / SIP INFO

Networking

Physical: 10/100/1000 Mbps Ethernet, dual bridged port for PC bypass
IP Configuration: Static / DHCP / PPPoE
Network Access Control: 802.1x
VPN: L2TP / PPTP
VLAN
LLDP
MD5 authentication
QoS

Protocols

SIP2.0 over UDP/TCP/TLS
RTP/RTCP/SRTP
STUN
DHCP
LLDP
PPPoE
802.1x
L2TP
OpenVPN
SNTP
FTP/TFTP
HTTP/HTTPS

Deployment & Maintenance

Auto-Provisioning via FTP/TFTP/HTTP/HTTPS/DHCP OPT66/SIP PnP/TR-069
Web Management Portal
Supports third party communication APP
Supports Web, Telnet
Supports encrypted configuration files download with AES
Supports U Disk/Web upgrade
Supports backup/restore/factory reset data